As this article doesn't contain an abstract, the image below is necessary to enable the article to be indexed by certain search engines. The resolution of the full-text PDF is much higher than that shown here.
a1 Centre for Study and Research on Higher Education Systems, CIRSIS, University of Pavia, 12, via Luino –27100 Pavia. Italy. E-mail: alles_cavalli@hotmail.com
a2 International Centre for Higher Education Research, INCHER, University of Kassel, Mönchebergstrasse 17 – 34109 Kassel. Germany. E-mail: teichler@incher.uni-kassel.de